In the upcoming redesign of Stencyl.com (timing of this is still up in the air), I'll make sure we get a proper page going for extensions as part of a brand new "Developer Center" section of the site.

It would be a stretch to call it a "market" since no money's going to change hands (though you will be able to accept donations/tips via Paypal), but the presentation may be market-like. I hope that this further encourages the building of extensions for our platform.

In the upcoming redesign of Stencyl.com (timing of this is still up in the air), I'll make sure we get a proper page going for extensions as part of a brand new "Developer Center" section of the site.

It would be a stretch to call it a "market" since no money's going to change hands (though you will be able to accept donations/tips via Paypal), but the presentation may be market-like. I hope that this further encourages the building of extensions for our platform.

That would be nice. Also behaviors, code snippets, full game engines or just demo for some mechanics(like Tuo's stuffs) would be cool.

That would help a lot and is along the same lines as the pre-shipped behavior icons. The target size is 120 x 90, but if you really want to be safe, make it a little bigger (160 x 120) if you can in case I change my mind about the image sizing.